Practise at 18:10 - after the first row operation, you could just subtract R4 and R2 as the two rows are the same, which gives R4 (or R2) to be just a row of zeroes, saving you some extra workings! ;)
@@DS-gn2hd YOO. It was a 6 page exam, BUT I FORGOT TO LOOK ON THE BACK OF THE LAST PAGE. So I missed an entire free response, funnily I knew all the answers when I got the exam back. I could have gotten a 91 then, but since it was 20 points, I ended up with a 71. LOLL
at 14:39, do you have to multiply by 1/4? I believe if I did not, I would just have a 4 in my second pivot position and my answer would still be -88. Please advise.
hi, hope you will see this. So at 14:11 i instead did row 3 = row 3 times 2 + row 2, since the 4 was now a zero i multiplied the product which would be -88 and then multiplied by 2 and got -176. could help me understand what went wrong
I hope to download your video and upload it to Douyin in mainland China. Of course, I will indicate that the video is from your RUclips channel when uploading it to Douyin in China. Is that ok?
Hi professor! So I tried the practice question by doing row operation to get the lower triangular form matrix. However, I could not get the same answer. May I get any explanation on that?
I'm not sure if later on the course you explain what a determinant is (as a concept not how it is calculated), but i'd really like that you explained that concept. Congratulations, it's a great course.
i have been wanting that too! it's confusing to me to memorize all these properties without an intuition for what the determinant is, and how these operations affect it.
In the beginning you said that if you're scaling you also scaled the determinant by the same amount but later in the video u used the reciprocal of the scaling value you used so I'm assuming the reciprocal is right?
"Could I go back and do it the long way? Yes"
"Am I going to do that? No" LOL
Here I wanted to express my deep gratitude for the videos you have put together madam.
i like how you brike it down into its smallest steps so we can't miss any details!
Practise at 18:10 - after the first row operation, you could just subtract R4 and R2 as the two rows are the same, which gives R4 (or R2) to be just a row of zeroes, saving you some extra workings! ;)
Thank you! It finally clicked for me with your clear explanation and example.
Thank you so much. I'm cramming 12 sections into 3 days because I procrastinated for an entire month :/
It's a good feeling know that either the past, present, or future there'll always be procrastinators like myself
I crammed it into an all nighter before the exam
yo same.. fuck me, but imma get a 100 on this exam on god forreal
@@dagger_wrist did you get a 100
@@DS-gn2hd YOO. It was a 6 page exam, BUT I FORGOT TO LOOK ON THE BACK OF THE LAST PAGE.
So I missed an entire free response, funnily I knew all the answers when I got the exam back.
I could have gotten a 91 then, but since it was 20 points, I ended up with a 71.
LOLL
back on the horse with a perfect video again...and unit 2 in the books!
may I know which book she is referring to ?
You are amazing, please come to UT Dallas
You are saving me throughout uni
god bless you
I wish this had 3.3 cramers rule after this one
perfect explanation
Thank you for all of these videos
so good
at 14:39, do you have to multiply by 1/4? I believe if I did not, I would just have a 4 in my second pivot position and my answer would still be -88. Please advise.
I have the same question. I don't think that operation was necessary.
Thank you so much, you're my hero ;)
You are welcome!
hi, hope you will see this. So at 14:11 i instead did row 3 = row 3 times 2 + row 2, since the 4 was now a zero i multiplied the product which would be -88 and then multiplied by 2 and got -176. could help me understand what went wrong
19:40 YO THAT IS SO SMART
to combine steps in what would be pivot method determinant and cofactor method
I hope to download your video and upload it to Douyin in mainland China. Of course, I will indicate that the video is from your RUclips channel when uploading it to Douyin in China. Is that ok?
So good
Thankyou so much, this helped me alot. 👍🏻🤝
A true power mom
Hi professor! So I tried the practice question by doing row operation to get the lower triangular form matrix. However, I could not get the same answer. May I get any explanation on that?
Thank You!
I'm not sure if later on the course you explain what a determinant is (as a concept not how it is calculated), but i'd really like that you explained that concept. Congratulations, it's a great course.
i have been wanting that too! it's confusing to me to memorize all these properties without an intuition for what the determinant is, and how these operations affect it.
3b1b is great for the concepts and developing a geometrical intuition
In the beginning you said that if you're scaling you also scaled the determinant by the same amount but later in the video u used the reciprocal of the scaling value you used so I'm assuming the reciprocal is right?
I came to comments as I noticed this too, and it seems as if it is the reciprocal after further research
@@noahstewart8054 my teacher said it was the normal scalar not the reciprocal
thank you
please name the book being used
@@x.74.m56 David Lay Linear Algebra and its Applications
bu videoya geri dön
do you have videos on partitioned matrix?
Elhacen Cheikh I have videos on augmented matrices but not partitioned matrices.
complete
00:20 which textbook
Lay’s Linear Algebra and It’s Applications
my exam is today 🫠 thanks for the step by step you’ve gotten me this far, here’s to another!